UPSTREAM: arm64: unexport walk_stackframe

The walk_stackframe functions is architecture-specific, with a varying
prototype, and common code should not use it directly. None of its
current users can be built as modules. With THREAD_INFO_IN_TASK, users
will also need to hold a stack reference before calling it.

There's no reason for it to be exported, and it's very easy to misuse,
so unexport it for now.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Bug: 38331309
Change-Id: Ibe0dca36cc7d35f92c6bc13b373755d82f0eb9ef
(cherry picked from commit 2020a5ae7c8c2c8504565004915017507b135c63)
Signed-off-by: Zubin Mithra <zsm@google.com>

diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index d460601..191cc6c 100644 (file)
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -126,7 +126,6 @@ void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
                        break;
        }
 }
-EXPORT_SYMBOL(walk_stackframe);
 
 #ifdef CONFIG_STACKTRACE
 struct stack_trace_data {